package Filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

/**
 * @author cyt
 * @date 2020/8/15
 */
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest)servletRequest;
        String servletPath = httpServletRequest.getServletPath();
        Object manager = httpServletRequest.getSession().getAttribute("manager");
        if(!servletPath.contains("/login") && manager == null){
            httpServletRequest.getRequestDispatcher("login.jsp").forward(servletRequest,servletResponse);
        }else {
            filterChain.doFilter(servletRequest,servletResponse);
        }
    }

    @Override
    public void destroy() {

    }
}
